Richard’s colonoscopy (Patreon)

Last year, when Richard’s doctor prescribed him a colonoscopy, the mechanic was already hard at the thought of being inflated with air by a professional. He’s been doing air inflation in his garage at the end of his shift for more than 20 years. He would plug a tube in his ass, start the air compressor, and feel himself grow like a balloon. He loves this feeling so much that he doesn’t even have to stroke his cock. When he’s stretched to his absolute fullness, seconds away from exploding, he would shoot the biggest loads, hand free, and quickly turn off the machine. Needless to say that 20 years of stretching trained him able to contain way much more air than most. He would push himself further and further, making his orgasms even better every time he reached a new record size.

On the day of his colonoscopy, he was excited, not only because he was going to be inflated by someone else for the first time, but also because he wanted to see the look on his doctor’s face when he’ll show him just how big he can inflate.

Naked on the hospital bed, he was already hard. The doctor didn’t make a fuss about his throbbing cock, bouncing on his fat pad.

Doctor: “I’m going to slide a tube inside you. It will introduce air into your bowel, allowing me to move a camera inside your intestines, to see if there’s anything abnormal”

Richard: “You’re going to inflate me like a balloon, doctor? Don’t you worry that my belly will get too big? What if I’m too big to leave the room afterward?”

Precum was leaking abundantly from Richard, hard cock.

Doctor: “Mmmh... yeah. Like a balloon. We will need to fully distend your intestines, so your belly will be fully inflated, yes. But don’t worry, most patients only get a small belly, as if they had a big meal.”
Richard: “Fully inflated. Perfect.”

He almost came at this very moment. It was a dream scenario for him.

The doctor inserted the tube inside him, and he felt some air rushing into him. He’s so used to the pressure of a powerful air compressor, that this was nothing but a breeze for him.

His fat belly started to slowly rise. The big guy put both hands on each side of it, closed his eyes, and enjoyed his favorite thing in the world: feeling himself grow bigger, out of control, inflated like a balloon.

After a while, his belly had reached a size similar to what the doctor used to see during those exams.

Doctor: “See, that wasn’t so bad. You’ve got a big belly, but I’m pretty sure it won’t get much bigger than this.”

The big guy’s excitement and his dick were deflating from disappointment.

Doctor: “Mmmh, wait, it seems you are not completely filled yet, despite your belly size. Hold on.”

The hard-on came back in full force.

Richard: “Don’t worry, I’m not feeling any pain, you can keep going and inflate me as much as you need to, doctor.”

Doctor: “OK then. Wait a second, I’ll need a second air canister.”

While the doctor was away, Richard reached for his cock, unable to restrain himself. He was hornier than ever. He lost himself in the moment and started to jerk off.

He got startled when the doctor came back, surprising him with his dick in his hand.

Doctor: “Oh! Please stop... It must be your prostate, being stimulated by the inflated bowels around it. I know it’s tough, but you need to let me finish my job here.”

Richard: “Sorry doctor, I don’t know what’s happening here. Don’t hesitate to add air pressure, I’m sure I can handle it.”

So it continued, for another 15 minutes. Richard’s belly had blown up the size of a large fitness ball. The doctor couldn’t believe it.

Doctor: “3 air canisters and your bowels aren’t still fully distended. I have never seen anything like it!”
Richard: “I’m a big guy, I can take it. More.”

The doctor came back with multiple air canisters, unsure just how much air he would need to fill this enormous balloon of a belly.

A steady stream of air was filling the big guy, and his belly wasn’t showing any signs of strain. It just got bigger.

At one point, the doctor wasn’t sure what to make of the enormous size of Richard’s belly, so he ignored it, and just checked the pressure gauge, which was supposed to warn him when there was too much pressure in the patient’s insides. That warning never came. So he focused his attention on the camera, searching for irregularity inside the intestines, while the air continued to stretch Richard even more.

After a few minutes, he lifted his head and got scared by witnessing the biggest belly he ever saw in his life.

Doctor: “Oh my god! You’re gonna blow if we don’t stop this!”

Richard was convulsing from pleasure. It seems like the slow flow of air allowed him to inflate like never before. He felt immense and hungry for size. He couldn’t even lift his head to see how truly huge he has gotten: he could only see a vast wall of skin, expanding.

Richard: “More. MORE. MOOOOOOORRRRREEEEE!”

When he felt the ceiling brushing against his belly, he lost it.

Richard: “AAAAAAAAARRRRRGGGGGGGHHHHHH!!!!”

An explosion of cum came out of his cock, right on the doctor’s face. The pressure was so great that the old man lost his balance and fell to the ground.

A few seconds of silence filled with discomfort went by. The old doctor was in complete shock, lying on the ground, covered in cum.

Richard: “I guess…em… my prostate was too stimulated, like you said… he he he…”

The doctor left the room, disgusted. Eventually, he came back to finish the exam. The procedure normally ends with a pump sucking the air out of the intestines to deflate the belly, but the doctor was so pissed off that he pushed Richard, still inflated like a blimp, out of the room. The huge man couldn’t put back his own pants, so he just walked home naked, fully erect, waddling from side to side, with his enormous belly leading the way.